US3857650A - Vaned rotor for gas turbines - Google Patents
Vaned rotor for gas turbines Download PDFInfo
- Publication number
- US3857650A US3857650A US00408335A US40833573A US3857650A US 3857650 A US3857650 A US 3857650A US 00408335 A US00408335 A US 00408335A US 40833573 A US40833573 A US 40833573A US 3857650 A US3857650 A US 3857650A
- Authority
- US
- United States
- Prior art keywords
- rotor
- vanes
- coil
- vaned
- support surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
- F01D21/045—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position special arrangements in stators or in rotors dealing with breaking-off of part of rotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
- F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding
Definitions
- ABSTRACT A vaned rotor of the type comprising a central metal hub or rotor body carrying a plurality of rotor blades made of a ceramic material, in which the blades are simply located on the rotor body and held in place by a coil of carbon fibres or ceramic fibres which surrounds the blades.
- each blade has a transverse part at the radially outer end thereof, which is partly cylindrical and which together with the transverse parts of the other blades, forms a substantially cylindrical support surface for the coil.
- This invention relates to vaned rotors for gas turbines, and particularly to rotors of the type having a metal body and a number of ceramic vanes attached at the root thereof to the rotor body. Such rotors are particularly suited to operate in gases at a very high temperature.
- ceramic materials used for such vanes have much better physical properties at high temperatures (i.e., over l,lC than any metal alloy, especially if undergoing compression loads, they are nevertheless very difficult to couple to metal parts because of their relative fragility, lack of ductility, and their low coefficient of expansion.
- the present invention seeks to provide a vaned rotor for a gas turbine, of the type having a metal rotor body and ceramic vanes, in which the above mentioned inconveniences are overcome.
- a vaned rotor for a gas turbine of the type comprising a rotor having a metal rotor body and a plurality of ceramic vanes attached to the periphery of the metal body, in which each vane has a transverse part at the radially outer end thereof, the said transverse parts of the vanes together forming a support surface around which is wound a coil of substantially inextensible filaments, the coil acting to absorb the radial forces exerted on the vanes of the rotor during use.
- FIG. 1 is a view in axial section of part ofa rotor for a gas turbine, formed as an embodiment of this invention; and 1 FIG. 2 is a partial face view of the rotor illustrated in FIG. 1.
- the periphery 12 of the disc 10 has a number of grooves which extend parallel to the axis of the disc, in which the roots 16 of a number of vanes 18 are located.
- the shape of the grooves 20 is not important as far as this invention is concerned and can be any suitable shape instead of that shown; for example they could have a which are orthogonal to the grooves 20.
- the vanes 18 are made of a ceramic material and at the radially outer end each has a transverse portion 22, formed as a part-cylindrical surface coaxial with the disc 10.
- Each transverse portion 22 is integral with the vane 18 on which it is formed, and is provided with axially spaced, circumferentially extending lateral shoulders or borders 24 and 26.
- the combined transverse portions 22 of all the vanes 18 forms an effectively continuous cylindrical surface around which is wound a coil 28 formed by filaments of ceramic fibres or carbon fibres having-a high modulus of elasticity.
- the coil of filaments acts to hold the vanes 18 on the disc 10 and to maintain them in position during operation of the turbine without relying on any form of coupling at the roots of the vanes.
- the fibres used are sensitive to oxidation they can be protected, during winding of the coil onto the cylindrical surface formed by the transverse parts of the vanes, with a thin layer of liquid ceramic, which after baking will encapsulate the fibres isolating them from the oxidising agents; alternatively metallization before or after the winding operation may be effected.
- a vaned rotor for a gas turbine of the type comprising:
- each vane has a transverse part at the radially outer end thereof, said transverse parts of said vanes together forming a support surface
- each said vane is a partly cylindrical surface, said partly cylindrical surfaces together forming a substantially continuous cylindrical support surface, two lateral shoulders on said radially outer surface of each said transverse part, said shoulders being axially spaced and extending sub stantially circumferentially of said cylindrical surface,
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT70323/72A IT975329B (it) | 1972-10-23 | 1972-10-23 | Struttura di parti metalliche e nom metalliche statiche o rotanti per ambienti ad alta temperatura particolarmente per rotori e stato ri di turbine a gas |
Publications (1)
Publication Number | Publication Date |
---|---|
US3857650A true US3857650A (en) | 1974-12-31 |
Family
ID=11313765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00408335A Expired - Lifetime US3857650A (en) | 1972-10-23 | 1973-10-23 | Vaned rotor for gas turbines |
Country Status (4)
Country | Link |
---|---|
US (1) | US3857650A (it) |
FR (1) | FR2204216A5 (it) |
GB (1) | GB1411316A (it) |
IT (1) | IT975329B (it) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011295A (en) * | 1974-10-07 | 1977-03-08 | The Garrett Corporation | Ceramic rotor for gas turbine engine |
US4017209A (en) * | 1975-12-15 | 1977-04-12 | United Technologies Corporation | Turbine rotor construction |
US4580943A (en) * | 1980-12-29 | 1986-04-08 | The United States Of America As Represented By The Secretary Of The Army | Turbine wheel for hot gas turbine engine |
US4767273A (en) * | 1987-02-24 | 1988-08-30 | Westinghouse Electric Corp. | Apparatus and method for reducing blade flop in steam turbine |
WO1999037888A1 (en) * | 1998-01-23 | 1999-07-29 | Diversitech, Inc. | Shrouds for gas turbine engines and methods for making the same |
US6439844B1 (en) * | 2000-12-11 | 2002-08-27 | General Electric Company | Turbine bucket cover and brush seal |
US20100158675A1 (en) * | 2008-12-23 | 2010-06-24 | Snecma | Turbomachine rotor having blades of composite material provided with metal labyrinth teeth |
GB2483495A (en) * | 2010-09-10 | 2012-03-14 | Magna Parva Ltd | Rotor blade disc, eg for a turbofan engine, having blades supported by an outer ring |
US20140301858A1 (en) * | 2011-08-15 | 2014-10-09 | Tsinghua University | Rotor device, turbine rotor device, and gas turbine and turbine engine having same |
GB2521588A (en) * | 2013-10-11 | 2015-07-01 | Reaction Engines Ltd | Turbine blades |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2475113A1 (fr) * | 1980-02-04 | 1981-08-07 | Rockwell International Corp | Rotor ceramique pour turbine |
DE3842710C1 (it) * | 1988-12-19 | 1989-08-03 | Mtu Muenchen Gmbh |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR55020E (fr) * | 1946-09-20 | 1951-06-05 | Turbine à gaz à haute température | |
FR997219A (fr) * | 1945-06-16 | 1952-01-03 | Turbine | |
US3042366A (en) * | 1958-05-05 | 1962-07-03 | Holmquist Ernst Rudolf Magnus | Axial flow gas turbine |
US3095138A (en) * | 1957-05-28 | 1963-06-25 | Studebaker Corp | Rotating shroud |
US3403844A (en) * | 1967-10-02 | 1968-10-01 | Gen Electric | Bladed member and method for making |
US3556675A (en) * | 1969-01-29 | 1971-01-19 | Gen Electric | Turbomachinery rotor with integral shroud |
US3601500A (en) * | 1968-08-28 | 1971-08-24 | Rolls Royce | Rotor assembly for a fluid flow machine |
US3754839A (en) * | 1972-05-01 | 1973-08-28 | United Aircraft Corp | Filament reinforced rotor assembly |
-
1972
- 1972-10-23 IT IT70323/72A patent/IT975329B/it active
-
1973
- 1973-10-22 GB GB4902873A patent/GB1411316A/en not_active Expired
- 1973-10-22 FR FR7337623A patent/FR2204216A5/fr not_active Expired
- 1973-10-23 US US00408335A patent/US3857650A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR997219A (fr) * | 1945-06-16 | 1952-01-03 | Turbine | |
FR55020E (fr) * | 1946-09-20 | 1951-06-05 | Turbine à gaz à haute température | |
US3095138A (en) * | 1957-05-28 | 1963-06-25 | Studebaker Corp | Rotating shroud |
US3042366A (en) * | 1958-05-05 | 1962-07-03 | Holmquist Ernst Rudolf Magnus | Axial flow gas turbine |
US3403844A (en) * | 1967-10-02 | 1968-10-01 | Gen Electric | Bladed member and method for making |
US3601500A (en) * | 1968-08-28 | 1971-08-24 | Rolls Royce | Rotor assembly for a fluid flow machine |
US3556675A (en) * | 1969-01-29 | 1971-01-19 | Gen Electric | Turbomachinery rotor with integral shroud |
US3754839A (en) * | 1972-05-01 | 1973-08-28 | United Aircraft Corp | Filament reinforced rotor assembly |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011295A (en) * | 1974-10-07 | 1977-03-08 | The Garrett Corporation | Ceramic rotor for gas turbine engine |
US4076456A (en) * | 1974-10-07 | 1978-02-28 | The Garrett Corporation | Ceramic rotor for gas turbine engine |
US4017209A (en) * | 1975-12-15 | 1977-04-12 | United Technologies Corporation | Turbine rotor construction |
US4580943A (en) * | 1980-12-29 | 1986-04-08 | The United States Of America As Represented By The Secretary Of The Army | Turbine wheel for hot gas turbine engine |
US4767273A (en) * | 1987-02-24 | 1988-08-30 | Westinghouse Electric Corp. | Apparatus and method for reducing blade flop in steam turbine |
US6223524B1 (en) | 1998-01-23 | 2001-05-01 | Diversitech, Inc. | Shrouds for gas turbine engines and methods for making the same |
WO1999037888A1 (en) * | 1998-01-23 | 1999-07-29 | Diversitech, Inc. | Shrouds for gas turbine engines and methods for making the same |
US6439844B1 (en) * | 2000-12-11 | 2002-08-27 | General Electric Company | Turbine bucket cover and brush seal |
US20100158675A1 (en) * | 2008-12-23 | 2010-06-24 | Snecma | Turbomachine rotor having blades of composite material provided with metal labyrinth teeth |
US8870531B2 (en) * | 2008-12-23 | 2014-10-28 | Snecma | Turbomachine rotor having blades of composite material provided with metal labyrinth teeth |
GB2483495A (en) * | 2010-09-10 | 2012-03-14 | Magna Parva Ltd | Rotor blade disc, eg for a turbofan engine, having blades supported by an outer ring |
GB2483495B (en) * | 2010-09-10 | 2013-02-13 | Magnaparva Space Ltd | Mounting of rotor blades |
US20140301858A1 (en) * | 2011-08-15 | 2014-10-09 | Tsinghua University | Rotor device, turbine rotor device, and gas turbine and turbine engine having same |
US10378365B2 (en) * | 2011-08-15 | 2019-08-13 | Tsinghua University | Rotor device, turbine rotor device, and gas turbine and turbine engine having same |
GB2521588A (en) * | 2013-10-11 | 2015-07-01 | Reaction Engines Ltd | Turbine blades |
Also Published As
Publication number | Publication date |
---|---|
GB1411316A (en) | 1975-10-22 |
FR2204216A5 (it) | 1974-05-17 |
IT975329B (it) | 1974-07-20 |
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